Merge pull request #16 from aportale/master

Not using PNG compression in ICO, in order to support WinXP
Update README.md
Refactor color scheme code
Don't include units for translation
Add Standard Gravity constant

http://code.google.com/p/speedcrunch/issues/detail?id=358
Add support for window opacity

http://code.google.com/p/speedcrunch/issues/detail?id=409

Opacity can be modified with Shift+Control+WheelUp/Down.
Bring back double-click to insert expression into the editor

https://code.google.com/p/speedcrunch/issues/detail?id=475

By double-clicking on an expression from the result display, it will be
inserted into the editor. Same goes with results, which are pasted without the
equal sign prefix.
Automatic Result Reuse does not work with - operator

https://code.google.com/p/speedcrunch/issues/detail?id=483

This is a regression in 0.11. All other operators work.
Refactor Book code by introducing a base class

This allows sharing with the upcoming User Manual feature, which will derive
from the newly introduced interface PageServer.
Add an initial user manual

https://code.google.com/p/speedcrunch/issues/detail?id=124

There is virtually no content in the manual. This change only adds the
necessary infrastructure, menu show/raise mechanism, and lacks text content.
REGRESSION(0.11) About Box does not get translated

https://code.google.com/p/speedcrunch/issues/detail?id=485
Add forgotten user manual feature to QMake script
Clean build scripts
Update README.md
Adopt ISO syntax for logarithmic functions

https://code.google.com/p/speedcrunch/issues/detail?id=381

Conversions in this change:
    lg  -> lb
    log -> lg
    ln  -> ln (was already correct)
Always show completion box on same offset whithin same context
Remove opaque pointer and clean up AutoHideLabel
Remove AutoHideLabel, make state label permanent
Remove dead code in Editor
Refactor editor event processing